Solid electrolytic capacitor and method of manufacturing the same

Abstract

A method of manufacturing a solid electrolytic capacitor includes: rolling an anode foil, a cathode foil and a separator together, the separator being a mixed fiber composed of a chemical fiber and a natural fiber and being between the anode foil and the cathode foil; degrading and removing the natural fiber with enzyme; and forming an electrolytic layer composed of solid polymer between the anode foil and the cathode foil after degrading and removing the natural fiber.

1. A method of manufacturing a solid electrolytic capacitor, comprising:
 rolling an anode foil, a cathode foil and a separator together, 
 the separator being a mixed fiber composed of a chemical fiber and a natural fiber and being between the anode foil and the cathode foil; 
 degrading and removing the natural fiber with enzyme; and 
 forming an electrolytic layer composed of solid polymer between the anode foil and the cathode foil after degrading and removing the natural fiber. 
 
     
     
       2. The method as claimed in  claim 1 , further comprising performing a chemical conversion treatment to the anode foil,
 wherein the step of degrading and removing the natural fiber is before the chemical conversion treatment. 
 
     
     
       3. The method as claimed in  claim 1 , wherein the mixed fiber is mainly composed of the natural fiber. 
     
     
       4. The method as claimed in  claim 1 , wherein the natural fiber is composed of fiber subjected to a refining treatment. 
     
     
       5. The method as claimed in  claim 1 , wherein the natural fiber is plant fiber. 
     
     
       6. The method as claimed in  claim 1 , wherein the chemical fiber is synthetic fiber. 
     
     
       7. The method as claimed in  claim 1 , wherein the enzyme includes at least one enzyme selected from cellulose-degrading enzymes and hemicellulose-degrading enzymes. 
     
     
       8. A solid electrolyte capacitor comprising:
 an anode foil; 
 a cathode foil; 
 a separator; and 
 an electrolytic layer, 
 the anode foil, the cathode foil and the separator being rolled together, 
 
       the separator being between the anode foil and the cathode foil, 
       the electrolytic layer being between the anode foil and the cathode foil, 
       the separator being composed of chemical synthetic fiber, and 
       a density of the synthetic fiber being less than 0.2 g/cm 3 .